Specifications

SiUS12-928_A Code Indication on the Remote Controller
Service Diagnosis 100
4. Code Indication on the Remote Controller
4.1 Error Codes and Description of Fault
Error Codes Description of Fault
System
00
Normal
U0
Refrigerant shortage
U2
Low-voltage detection or over-voltage detection
U4
Signal transmission error (between indoor and outdoor units)
U7
Signal transmission error (on outdoor unit PCB)
UA
Unspecified voltage (between indoor and outdoor units)
UH
Anti-icing function in other rooms
Indoor
Unit
A1
Indoor unit PCB abnormality
A5
Freeze-up protection control or heating peak-cut control
A6
Fan motor or related abnormality
C4
Indoor heat exchanger thermistor or related abnormality
C9
Room temperature thermistor or related abnormality
Outdoor
Unit
A5
Anti-icing function
E1
Outdoor unit PCB abnormality
E5
OL activation (compressor overload)
E6
Compressor lock
E7
DC fan lock
E8
Input overcurrent detection
EA
Four-way valve abnormality
F3
Discharge pipe temperature control
F6
High pressure control in cooling
H0
Compressor sensor system abnormality
H6
Position sensor abnormality
H8
CT or related abnormality
H9
Outdoor temperature thermistor or related abnormality
J3
Discharge pipe thermistor or related abnormality
J6
Outdoor heat exchanger thermistor or related abnormality
J8
Liquid pipe thermistor or related abnormality
J9
Gas pipe thermistor or related abnormality
L3
Electrical box temperature rise
L4
Radiation fin temperature rise
L5
Output overcurrent detection
P4
Radiation fin thermistor or related abnormality